body {
  width: 100vw;
  height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
  background-color: darkcyan;
  flex-direction: column;

  // 画布重叠
  #app {
    position: relative;
    background-color: gray;
    background-size: cover;
    background-position: center;
    cursor: pointer;
    border: 5px saddlebrown dotted;

    canvas {
      position: absolute;
    }
  }

  // 坦克数量
  #tankNum {
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 18px;

    span {
      padding: 10px;
      font-size: 28px;
      color: springgreen;
    }

    span:nth-child(3){
      font-size: 12px;
    }
  }

  #right {
    line-height: 50px;
    color: black;
    font-size: 14px;
    text-decoration: none;

    &:hover {
      color: springgreen;
    }
  }

}

